You got the point..mm author---nim might use this as face card because JK is now being in love-hate from readers but the fact she turned JK as the person he hate the most is not good idea.. she use another way reason why he turned JK in that way...
I could say, checkmate...
Maybe that's what author was trying to tell. In lot cases like JK, victims try hard to not be like their abusive guardians as they grow up. Even in this chapter you see JK saying he won't be like him. But these victims fail to shake off their abusive guardians shadow and their manipulation. Some victims turn out somewhat like Dan and some like JK.
Jaekyung said he’d never turn out like his father but in a sense, he did. He was already half way there by pursuing boxing and now, with the way he's abused Kim Dan… sure you could say he’s better off than his father, but they both still became abusers.